Stilbene dyestuffs and light-polarizing films or sheets containi

Organic compounds -- part of the class 532-570 series – Organic compounds – Azo

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534691, 8506, 8648, 252585, 359491, C09B 5604, C09B 35215, G02B 108

Patent

active

052722597

ABSTRACT:
Dyestuffs which in the form of the free acid conform to the formula ##STR1## in which X and Y independently represent --N.dbd.N--R, --CF.sub.3, --CONH.sub.2, --CONHR.sup.1, --CONR.sup.1 R.sup.2, --COOH, --COOR.sup.1, --CN, --NO.sub.2, --NH.sub.2, --NHR.sup.1, --NR.sup.1 R.sup.2, --OH, --OR.sup.1, --R.sup.1 CONH--, --O--CO--R.sup.1, halogen or a substituted or unsubstituted heterocyclic radical, provided that at least one of the radicals X or Y represents --N.dbd.N--R, in which

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patent: 5007942 (1991-04-01), Claussen et al.

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